Update changelog

Author: danielnelson

Diff for: CHANGELOG.md

@@ -13,6 +13,7 @@
   ```
 
 ### Features
+
 - [#3551](https://github.com/influxdata/telegraf/pull/3551): Add health status mapping from string to int in elasticsearch input.
 
 ### Bugfixes
@@ -116,6 +117,7 @@
 - [#3448](https://github.com/influxdata/telegraf/issues/3448): Use deb-systemd-invoke to restart service.
 - [#3553](https://github.com/influxdata/telegraf/issues/3553): Fix kafka_consumer outside range of offsets error.
 - [#3568](https://github.com/influxdata/telegraf/issues/3568): Fix separation of multiple prometheus_client outputs.
+- [#3577](https://github.com/influxdata/telegraf/issues/3577): Don't add system input uptime_format as a counter.
 
 ## v1.4.5 [2017-12-01]